Question

Why do the leaves of some trees turn yellow before falling?

Answer 1

Answer:

In autumn when it starts to get cold, some plants stop making chlorophyll. Instead, those plants break down chlorophyll into smaller molecules. As chlorophyll goes away, other pigments start to show their colors. This is why leaves turn yellow or red in fall.

Explanation:

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Answer 2

Answer:

due to breakdown of chlorophyll

Explanation:

In the fall, because of changes in length of daylight and temperature the leaves stop their food-making process. The chlorophyll breaks down, the green colour disappears, and the yellow to orange colours becomes visible and give the leaves part of their fall splendor.

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